User:Passavee

In my opinion iPhone OS 4's is the best OS in the present day. Iphone OS 4'S offers users a new way to quickly move between apps, and provides developers to easily add multitasking features to their apps.

These services include background audio, so apps like Pandora can play music in the background, and VoIP, so VoIP apps can receive a VoIP call even when the iPhone is asleep or the user is running other apps.

iPhone OS 4 provides multitasking to third party apps while preserving battery life and foreground app performance, which has until now proved elusive on mobile devices.